﻿#region Copyright (c) 2006-2012 nHydrate.org, All Rights Reserved
// --------------------------------------------------------------------- *
//                           NHYDRATE.ORG                                *
//              Copyright (c) 2006-2012 All Rights reserved              *
//                                                                       *
//                                                                       *
// This file and its contents are protected by United States and         *
// International copyright laws.  Unauthorized reproduction and/or       *
// distribution of all or any portion of the code contained herein       *
// is strictly prohibited and will result in severe civil and criminal   *
// penalties.  Any violations of this copyright will be prosecuted       *
// to the fullest extent possible under law.                             *
//                                                                       *
// THE SOURCE CODE CONTAINED HEREIN AND IN RELATED FILES IS PROVIDED     *
// TO THE REGISTERED DEVELOPER FOR THE PURPOSES OF EDUCATION AND         *
// TROUBLESHOOTING. UNDER NO CIRCUMSTANCES MAY ANY PORTION OF THE SOURCE *
// CODE BE DISTRIBUTED, DISCLOSED OR OTHERWISE MADE AVAILABLE TO ANY     *
// THIRD PARTY WITHOUT THE EXPRESS WRITTEN CONSENT OF THE NHYDRATE GROUP *
//                                                                       *
// UNDER NO CIRCUMSTANCES MAY THE SOURCE CODE BE USED IN WHOLE OR IN     *
// PART, AS THE BASIS FOR CREATING A PRODUCT THAT PROVIDES THE SAME, OR  *
// SUBSTANTIALLY THE SAME, FUNCTIONALITY AS THIS PRODUCT                 *
//                                                                       *
// THE REGISTERED DEVELOPER ACKNOWLEDGES THAT THIS SOURCE CODE           *
// CONTAINS VALUABLE AND PROPRIETARY TRADE SECRETS OF NHYDRATE,          *
// THE REGISTERED DEVELOPER AGREES TO EXPEND EVERY EFFORT TO             *
// INSURE ITS CONFIDENTIALITY.                                           *
//                                                                       *
// THE END USER LICENSE AGREEMENT (EULA) ACCOMPANYING THE PRODUCT        *
// PERMITS THE REGISTERED DEVELOPER TO REDISTRIBUTE THE PRODUCT IN       *
// EXECUTABLE FORM ONLY IN SUPPORT OF APPLICATIONS WRITTEN USING         *
// THE PRODUCT.  IT DOES NOT PROVIDE ANY RIGHTS REGARDING THE            *
// SOURCE CODE CONTAINED HEREIN.                                         *
//                                                                       *
// THIS COPYRIGHT NOTICE MAY NOT BE REMOVED FROM THIS FILE.              *
// --------------------------------------------------------------------- *
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;

namespace nHydrate.Dsl.Design.Converters
{
	internal class RangeMaxConverter : TypeConverter
	{
		public RangeMaxConverter()
		{
		}

		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
		{
			var column = context.Instance as nHydrate.Dsl.Field;
			if (destinationType == typeof(string)) return true;
			return base.CanConvertTo(context, destinationType);
		}

		public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
		{
			var column = context.Instance as nHydrate.Dsl.Field;
			try
			{
				if (destinationType == typeof(string))
				{
					var retval = string.Empty;
					if (column != null && column.IsNumericType())
					{
						retval = column.Max.ToString();
						if (double.IsNaN(column.Max))
							retval = string.Empty;
						else if (column.IsCalculated)
							retval = "undefined";
					}
					return retval;
				}
			}
			catch (Exception ex) { }
			return null;
		}

		public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
		{
			var column = context.Instance as nHydrate.Dsl.Field;
			if (sourceType == typeof(string))
				return true;
			else if (sourceType == typeof(double))
				return true;
			else
				return false;
		}

		public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
		{
			var column = context.Instance as nHydrate.Dsl.Field;
			if (value is string)
			{
				if (((string)value).Trim() == string.Empty)
				{
					return double.NaN;
				}
				else
				{
					double d;
					if (double.TryParse((string)value, out d))
						return d;
					//else
					//  throw new Exception("Cannot convert to double!");
				}
				return column.Max;
			}
			return base.ConvertFrom(context, culture, value);
		}

	}
}
